Method of making hubs upon sheet-metal articles.



G. P. REY.

METHOD OF MAKING HUBS SHEET METAL ABTIGLW APPLIOATIOH mum FEB. :5, 1m.

Patented Dec. 24, 1912.

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Wfinesses UNITED STATES rnrnn'r OFFICE.

o'rmnmis rnnmo'ur GURREY, or rornxa, KANSAS, ASSIGNOR To THE KANSAS vorr- ING MACHINE COMPANY, OF TOPEKA, KANSAS, A CORPORATION OIEKANSAS.

' mnrnonzoia' MAKING nuns upon SHEET-METAL ARTICLES.

Application filed February 25, 1909. Serial No. 480,033.

T 0 all whom it my canc l w.

Be it known that I, GHARLES FREMONT CURREY, a citizen of the United. States, and

a'resident of Topeka, in tliecounty of Shawnee and State of Kansas, have invented a new and useful Improvement in the Method of Making Hubs upon Sheet-Metal Articles,

of whichthe followingis a specification.

My. invention relates in particular to the method of making various articles or parts used in voting-machines" having numerous shafts on whichnumerous devices, such as looking dogs, arms, etc, are mounted. And

the object is to provide a simple, economical, 'and efficient method of making a sultable article of this 'kind with'an integral hub,

both the'article and its hub being made.

from sheet metal. it

invention in its preferred form, and have shown the best mode of applying the principles thereof; but it will be understood that my invention is not confined to the exact details of the drawing and ofthe description of the drawing; and that, within the scope of the appended claim I contemplate changes in form, proportions, and materials, the-transposition of parts, andthe substitution of equivalent members, without depart- -from the spirit of the invention. Figures 1, 2, 3, and 4, respectively, are vertical center sectional 'views of the several diesand corresponding punches .used in forming the article with the integral hub from sheet metal, each view showing also the sheet-metal. in the form made by the punch and die. Fig. 5 is a side view of a completed article or part with the integral.

hub, the part having been cut by the blanking die not here shown. Fig. 6 is a face View of the punch shown in Fig. i, and Fig. 7 is a face view of the die shown in Fig. l. Fig. 8 is a side view of apiece of the sheet metal with the integral hub as it comes from the last punch and die, namely, those shown in Figs. 4, 6, and 7.

Similar reference numerals indicate like or corresponding parts throughout the several views. 1

' 9'represents a strip or piece of sheet metal, and 10 is a hub formed therein and therefrom, its outer end being beveled, as shown at 11. And in Fig. 5 I have shown a device Specification of Letters Patent.

Patented Dec.

which is adapted to be mounted on a shaft to serve both as a universal locking device and as a selective locking device in a voting machine. While any suitable material may be used for forming this article with the in-- tegral hub from sheet metal, yet I prefer to use half-hard brass because it answers all ,the requirements of a voting machine construction, and permits the hub to be drawn out'from the sheet metal in the manner hereinafter described to form the integral sheet metal hub. The article shownin Fig. 5 is a sample only. After the hubs have been formed in the sheet metal, various forms may be punched out from the sheet metal with the integral hub, as any blanking dieand 16 representing the die. The base 20 of the punch is, it will be noted, considerably broader than the diameter of the inside of the hub which is to be finally formed, and

the end of the punch is quite rounded, so

that the effect is to form a dent in the sheet metal as indicated in the drawing- The article is then operated upon by punch 13 and die l7, the base 22 of-this punch being narrower than the base of the firstpunch, but broader than the final diameter of the hub, the sides 23 being straighter, and the point 24 being longer, so as to draw out the dent at the end and bring it in at the base,

as shown in the drawing. The article is next subjected to punch 14 and die 18. The

punch is ofuniform diameter throughout its length, as indicated at 25, except that the end 27 is slightly rounded off, as indicated at 26. This operation forms the hub in .merous devices are mounted on each shaft,

there is great economy in using this integral device and hub made from. sheet metal and in making these devices by the method I have described, as it greatly reduces the cost of manufacturing the machine; Whereas it has been customary to form these devices from sheet metal, and then make separate hubs or bushings, and then secure the devices on the bushings. But by my method, I am able to draw out a hub from the sheet metal which hub is long and suitable tor a substantial bearing on the shaft for holding the article or blank rigidly on the shaft. To be more specfic I am able, by the method herein described, with No. 16 half-hard sheet brass,.to draw out a hub about one-quarter in h long with an inside diameter of about se\ en-thirty-seconds of an inch.

eas es What I claim is:

The method of making hubs upon sheet metal articles, consisting of first indenting" the sheet metal leaving the metal outside of the indented area intact, the indentation being broader at the base than the final inside diameter of the hub, then drawing up the sheet metal around the base and spreading it out at the bottom to form an elongated substantially cylindrical hub, and then cut ting oh the extreme bottom" In testimony whereof I have hereunto signed my name in the presence of subscribing witnesses.

CHARLES FREMONT GURREY. Witnesses:

A. M. CURREY,

HAZEL D. RICHARDSON. 

